class MacCFBBlockCipher
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
private int |
blockSize |
private byte[] |
cfbOutV |
private byte[] |
cfbV |
private BlockCipher |
cipher |
private byte[] |
IV |
Constructor and Description |
---|
MacCFBBlockCipher(BlockCipher cipher,
int bitBlockSize)
Basic constructor.
|
Modifier and Type | Method and Description |
---|---|
java.lang.String |
getAlgorithmName()
return the algorithm name and mode.
|
int |
getBlockSize()
return the block size we are operating at.
|
(package private) void |
getMacBlock(byte[] mac) |
void |
init(CipherParameters params)
Initialise the cipher and, possibly, the initialisation vector (IV).
|
int |
processBlock(byte[] in,
int inOff,
byte[] out,
int outOff)
Process one block of input from the array in and write it to
the out array.
|
void |
reset()
reset the chaining vector back to the IV and reset the underlying
cipher.
|
private byte[] IV
private byte[] cfbV
private byte[] cfbOutV
private int blockSize
private BlockCipher cipher
public MacCFBBlockCipher(BlockCipher cipher, int bitBlockSize)
cipher
- the block cipher to be used as the basis of the
feedback mode.blockSize
- the block size in bits (note: a multiple of 8)public void init(CipherParameters params) throws java.lang.IllegalArgumentException
param
- the key and other data required by the cipher.java.lang.IllegalArgumentException
- if the params argument is
inappropriate.public java.lang.String getAlgorithmName()
public int getBlockSize()
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) throws DataLengthException, java.lang.IllegalStateException
in
- the array containing the input data.inOff
- offset into the in array the data starts at.out
- the array the output data will be copied into.outOff
- the offset into the out array the output will start at.DataLengthException
- if there isn't enough data in in, or
space in out.java.lang.IllegalStateException
- if the cipher isn't initialised.public void reset()
void getMacBlock(byte[] mac)